Answer:
To me a two column proof is usually associated with Euclidean Geometry.
To use it here in this rather simplistic problem is like using a sledge hammer to drive in a finishing nail ...
here is what I would do
7y=8x-14; y=6
then:
42 = 8x - 14
56 = 8x
x = 56/8 = 7
There! I have proven it.
Explanation:
Answer:
A.in Group 8A (far right-hand side)
Explanation:
The so-called noble gases are found in group VIIIA of the periodic table, on the right side. It corresponds to the gases: Neon, Argon, Xenon, Helium, Radon, Helium.
They are atoms. a molecule is made up of atoms.
The answer will be Zn , that is zinc is the best metal to protect iron.
The iron corrosion can be protected by various method in which zinc, Zn is used.
1. Gavanization:
In this method iron that is Fe is coated with zinc that is Zn. Zinc is more prone to oxidation than iron so it will oxidise and thus protects iron .
2. Cathodic protection:
In this method, Zinc or magnesium is used to protect iron, these metals are electrically connected to the iron. The more active metal that is zinc or magnesium over here is the sacrificial anode. And the iron metal is the cathode that remains unoxidized.
3LiOH+Fe(NO3)3--›Fe(OH)3↓+3LiNO3
n(LiOH)=m/M=(25g)/(24g/mol)=1,0417mol
n(Fe(OH)3)=1/3n(LiOH)=0,3472mol
m(Fe(OH)3)=n*M=0,3472mol*107g/mol=37,15g